EP0816952A2 - Verfahren und Vorrichtung zur Erzeugung eines holographischen Stereogramms - Google Patents

Verfahren und Vorrichtung zur Erzeugung eines holographischen Stereogramms Download PDF

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Publication number
EP0816952A2
EP0816952A2 EP97401487A EP97401487A EP0816952A2 EP 0816952 A2 EP0816952 A2 EP 0816952A2 EP 97401487 A EP97401487 A EP 97401487A EP 97401487 A EP97401487 A EP 97401487A EP 0816952 A2 EP0816952 A2 EP 0816952A2
Authority
EP
European Patent Office
Prior art keywords
recording medium
hologram recording
mask
holographic
display means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97401487A
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English (en)
French (fr)
Other versions
EP0816952A3 (de
Inventor
Nobuhiro Kihara
Akira Shirakura
Shigeyuki Baba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Publication of EP0816952A2 publication Critical patent/EP0816952A2/de
Publication of EP0816952A3 publication Critical patent/EP0816952A3/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
    • G03H1/268—Holographic stereogram
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0402—Recording geometries or arrangements
    • G03H1/041—Optical element in the object space affecting the object beam, not otherwise provided for
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0402—Recording geometries or arrangements
    • G03H2001/0421—Parallax aspect
    • G03H2001/0423—Restricted parallax, e.g. horizontal parallax only holograms [HPO]
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
    • G03H1/268—Holographic stereogram
    • G03H2001/2685—One step recording process
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
    • G03H1/268—Holographic stereogram
    • G03H2001/2695—Dedicated printer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2210/00—Object characteristics
    • G03H2210/20—2D object
    • G03H2210/22—2D SLM object wherein the object beam is formed of the light modulated by the SLM
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2223/00—Optical components
    • G03H2223/14—Diffuser, e.g. lens array, random phase mask

Definitions

  • the present invention relates to a method and an apparatus for creating a holographic stereogram for three-dimensionally recognising a real image or a computer-created image.
  • the holographic stereogram having only horizontal parallax information includes a plurality of original images 101a to 101e obtained by sequentially imaging an object 100 from different points of observation in the horizontal direction on a hologram recording medium 102 as stripped holographic elements.
  • a laser beam with excellent interference is divided into two parts, one of which is a projected image (object beam) two-dimensionally modulated by an image display unit (for example, a LCD panel) and the other one of which is a reference beam. Both of the beams are condensed on each holographic element, that is a portion of a hologram recording medium composed of a photosensitive material. Then, an interference pattern is recorded as change of a refractive index of the photosensitive material at a holographic element.
  • Each of the holographic elements is formed by the above-mentioned process.
  • the strong diffuser panel disadvantageously makes the exposing range too wide so that a portion other than the necessary holographic element is exposed, as shown in Fig.2A.
  • the wider exposure may do damage to the image quality.
  • a pseudo-diffuser panel may be used for bringing about such weak diffusion as keeping the exposure inside of the holographic element width, as shown in Fig.2B, for the purpose of preventing leakage of light.
  • a mask having an aperture or slit corresponding to each holographic element is located on the hologram recording medium closely, so that the unnecessary object beam is screened. This makes it possible to positively expose the inside of the necessary holographic element width.
  • the present invention is proposed in consideration of the foregoing conventional conditions, and it is an object of the present invention to provide a method and an apparatus for creating a holographic stereogram which method and apparatus enable to offer an optically equivalent effect to the construction of locating a mask, without having to locate the mask on a hologram recording medium, and offer a high-quality hologram without having to complicate the area around the hologram recording medium.
  • a method for creating a holographic stereogram includes the steps of displaying an image corresponding to a co-ordinate location of the hologram recording medium on a display unit, condensing a laser beam transmitted through the display unit as an object beam on the co-ordinate location of the hologram recording medium and applying part of the laser beam before transmission through the display unit as a reference beam onto the hologram recording medium, and sequentially forming stripped or dotted holographic elements on the hologram recording medium, wherein a mask having an aperture or slit corresponding to each holographic element is disposed between the display unit and the hologram recording medium and the object beam is condensed through the mask and then is re-condensed through the effect of an optical system, and the condensed light is applied onto the hologram recording medium.
  • an apparatus for creating a holographic stereogram includes a display unit for displaying an image at the corresponding co-ordinate locations of the hologram recording medium, a laser beam source for applying a laser beam transmitted through the display unit as an object beam onto a hologram recording medium and part of the laser beam before transmission through the display unit as a reference beam onto the hologram recording medium, a diffuser panel for diffusing a beam and located close to the display unit, a mask located in the downstream of the light beam of the display unit and the diffuser panel and having a corresponding aperture or slit to each holographic element, a first optical system located between the display unit and the mask and for condensing the object beam transmitted through the display unit onto the opening of the mask, and a second optical system located between the mask and the hologram recording medium for re-condensing the object beam transmitted through the aperture of the mask onto the co-ordinate location of the hologram recording medium.
  • the diffuser panel serves to properly diffuse the object beam and the mask serves to screen the unnecessary object beam.
  • the object beam restricted by this mask is condensed to the necessary holographic element width through the effect of the optical system located between the mask and the hologram recording medium and then is applied to the hologram recording medium.
  • the foregoing arrangement makes it possible to offer the same optical effect as is achieved by locating a mask on the hologram recording medium, without having to actually locate the mask on the hologram recording medium and unnecessarily to complicate the area around the hologram recording medium.
  • the method and the apparatus according to the invention for creating a holographic stereogram make it possible to offer an optically equivalent effect to the method and the apparatus having a mask located on the hologram recording medium, without having to locate the mask thereon, and offer a high-quality hologram without having to complicate the area around the hologram recording medium.
  • the description will be directed to an arrangement of a system for creating a holographic stereogram according to an embodiment of the present invention.
  • This embodiment is concerned with a holographic stereogram provided with horizontal parallax information by recording a plurality of stripped holographic elements on one recording medium.
  • the present invention may be applied to holographic stereograms provided with horizontal and vertical parallax information by recording a plurality of dotted holographic elements on one recording medium.
  • the present system is a system for creating a so-called one-step holographic stereogram which directly corresponds to the hologram recording medium where an interference pattern of the object beam and the reference beam is recorded.
  • the system is arranged to have a data processing unit 1 for processing image data to be recorded, a control computer 2 for controlling an overall system, and a holographic stereogram printer apparatus 3 having an optical system for creating a holographic stereogram.
  • the data processing unit 1 operates to create parallax image series D3, based on a plurality of pieces of image data D1 containing parallax information, supplied from a parallax image series imaging device 13 provided with a multiple-lens camera, a movable camera or the like, or a plurality of pieces of image data D2 containing parallax information created by a computer 14 for generating image data.
  • the plurality of pieces of image data D1 containing the parallax information supplied from the parallax image series imaging device 13 indicate image data composed of plural images obtained by imaging a real object from different points of observation in the horizontal direction by means of concurrent imaging with a multiple-lens camera or sequential imaging with a moving camera.
  • the plurality of pieces of image data D2 containing the parallax information, created by the computer 14, indicate CAD (Computer-aided design) images or CG (Computer graphics) images created by providing sequential parallax in the horizontal direction.
  • CAD Computer-aided design
  • CG Computer graphics
  • the data processing unit 1 performs a given image treatment for the holographic stereogram of the parallax image series D3 through the effect of an image processing computer 11. Then, the treated image data D4 is recorded in a recording unit 12 such as a memory or a hard disk.
  • the data processing unit 1 When recording the image on the hologram recording medium, the data processing unit 1 operates to sequentially read the data one image by one image from the image data D4 recorded in the recording unit 12 and send out the image data D5 to the control computer 2.
  • control computer 2 operates to drive the holographic stereogram printer apparatus 3 so that the images of the image data D5 supplied from the data processing unit 1 are sequentially recorded in a hologram recording medium 30 located in the printer apparatus 3, as stripped holographic elements.
  • the control computer 2 controls a shutter 32, a display unit 41, a recording medium feeding mechanism and the other components located in the printer apparatus 3.
  • the control computer 2 operates to send out a control signal S1 to the shutter 32 for controlling the opening or closing of the shutter 32 and supplies the image data D5 to the display unit 41 so that the image of the image data D5 is displayed on the display unit 41.
  • the computer 3 also sends out a control signal S2 to the recording medium feeding mechanism for controlling the feeding operation of the mechanism.
  • Fig.4A shows an optical system of the overall printer apparatus 3 viewed from the top
  • Fig.4B shows a portion for the object beam of an optical system of the printer apparatus 3 viewed from the lateral direction.
  • the printer apparatus 3 includes a laser beam source 31 for firing a laser beam having a given wavelength, the shutter 32, and a half mirror 33, the latter two of which are located on an optical axis of a laser beam L1 emitted by the laser beam source 31.
  • the laser beam source 31 employs an argon laser having a wavelength of 514,5 nm and an output of 200 mW.
  • the shutter 32 is controlled by the control computer 2.
  • the shutter 32 is closed when the hologram recording medium 30 is not to be exposed or opened when the medium 30 is to be exposed.
  • the half mirror 33 serves to separate the laser beam L2 transmitted through the shutter 32 into the reference beam and the object beam.
  • the beam L3 reflected on the half mirror 33 is the reference beam.
  • the beam L4 transmitted through the half mirror 33 is the object beam.
  • the optical path of the reference beam reflected on the half mirror 33 and entered into the hologram recording medium 30 has substantially the same length as the optical path of the object beam transmitted through the half mirror 33 and entered into the hologram recording medium 30.
  • the similarity of the optical paths makes it possible to enhance the interference between the reference beam and the object beam, thereby creating a holographic stereogram offering a more vivid reproduced image.
  • a cylindrical lens 34 On the optical axis of the beam L3 reflected on the half mirror 33, there are arranged a cylindrical lens 34, a collimator lens 35 for making the reference beam parallel, and a totally reflective mirror 36, in the described order. Those components are for the optical system for the reference beam.
  • the beam reflected on the half mirror 33 is converted into diffuse light emitted from a point light source through the effect of the cylindrical lens 34. Then, the diffuse light is converted into the parallel light through the collimator lens 35. Next, the parallel light is reflected on the totally reflective mirror 36 and then is entered into the hologram recording medium 30.
  • a totally reflective mirror 38 for reflecting the transmitted beam from the half mirror 33
  • a spatial filter 39 composed of a convex lens and a pin hole combined therewith
  • a collimator lens 40 for making the object beam parallel
  • a display unit 41 for displaying an image of an object to be recorded
  • a diffuser panel 42 for diffusing the light transmitted through the display unit 41
  • a mask 43 having a stripped opening 43a, in the described order.
  • a first optical system is located for condensing the object beam transmitted through the diffuser panel onto the opening 43a of the mask 43.
  • a second optical system is located for condensing the object beam transmitted through the mask 43 onto the hologram recording medium 30.
  • the first optical system is composed of a condensing lens 44 (whose focal distance is 200 mm in this example).
  • the second optical system is composed of a lens 45 (whose focal distance is 600 mm in this example) for making the light transmitted through the mask 43 parallel and a cylindrical lens 46 (whose focal distance is 54 mm in this example) for condensing the parallel light onto the hologram recording medium 30.
  • a one-dimensional diffuser panel is located immediately before the hologram recording medium 30. (For passive holograms, the panel is not necessary.)
  • the beam L4 transmitted through the half mirror 33 is reflected on the totally reflective mirror 38 and then is converted into diffuse light emitted from a point light source through the effect of the spatial filter 39.
  • the diffuse light is converted into parallel light through the collimator lens 40.
  • the parallel light is entered into the display unit 41.
  • the spatial filter 40 is composed of an objective lens with a magnification of 20 times and a pin hole with a diameter of 20 ⁇ m.
  • the collimator lens 40 has a focal distance of 100 mm.
  • the display unit 41 is a passive image display device composed of a LCD, for example and is controlled by the control computer 2.
  • the display unit 41 is controlled to display the image formed by the image data D5 sent from the control computer 2.
  • the used LCD is a monochrome LCD whose pixels form a 480 x 1068 array and whose size is 16.8 mm x 29.9 mm.
  • the light transmitted through the display unit 41 is converted into the transmitted light corresponding to the image displayed on the display unit 41.
  • the transmitted light is diffused through the diffuser panel 42.
  • the diffuser panel 42 is just required to be located close to the display unit 41. It may be immediately before or after the display unit 41. In this embodiment, the diffuser panel 42 is located immediately after the display unit 41.
  • the diffuser panel 42 serves to slightly diffuse the transmitted light from the display unit 41 for diffusing the light inside of the holographic element. This makes a great contribution to improving the image quality of the created holographic stereogram.
  • the diffuser panel 42 may be fixed. In place, the panel 42 may be moved randomly each time the holographic element is formed so that the panel 42 may be relocated at each holographic element. This relocation enables to reduce the noise localised to infinity when a person observes the hologram.
  • the location of the diffuser panel 42 allows the width inside of the holographic element to be uniformly exposed. This improves the quality of the resulting hologram.
  • the diffusing effect of the diffuser panel 42 is required to be intensified to some extent.
  • the object beam diffused by the diffuser panel 42 is spread on the hologram recording medium 30. This results in exposing a wider range than the original width of the holographic element.
  • the mask 43 is used for screening the unnecessary light so that each holographic element may be properly exposed. That is, the diffusion done by the diffuser panel 42 and the screening of the unnecessary light through the mask 43 make it possible to obtain the state shown in Fig.2C.
  • the mask 43 is located immediately before the hologram recording medium 30, the area around the hologram recording medium 30 is made complicated.
  • the first and the second optical systems are located so that the mask 43 is spaced from the hologram recording medium 30.
  • the transmitted light from the display unit 41 is transmitted through the diffuser panel 42, where the light is diffused. Then, the diffused light is condensed through the condensing lens 44 located in the first optical system.
  • the diffuser panel 42 serves to keep the object beam spread overa certain area without being condensed to one point.
  • the object beam is shaped like a strip.
  • the condensing range is a f3/f2-fold projection of the opening 43a of the mask 43 when the lens 45 has a focal distance of f2 and the cylindrical lens 46 has a focal distance of f3,
  • the holographic stereogram printer apparatus 3 provides a recording medium feeding mechanism 50 for intermittently feeding the hologram recording medium 30 by one holographic element under the control of the control computer 2.
  • the recording medium feeding mechanism 50 is arranged to intermittently feed the film-shaped hologram recording medium in response to a control signal from the control computer 2.
  • the printer apparatus 3 creates the holographic stereogram, on the hologram recording medium 30 set to the recording medium feeding mechanism 50 in a given state, the printer apparatus 3 operates to sequentially record the image formed by each image data piece of the parallax image sequences as a stripped holographic element.
  • the hologram recording medium 30 used for the holographic stereogram creating system will be discussed in detail with reference to Figs. 5 and 6.
  • this hologram recording medium 30 is a so-called film-coating recording medium, which is formed of a tape-shaped film base material 30a, a photopolymer layer 30b formed on the film base material 30a, and a cover sheet 30c coated on the photopolymer layer 30b.
  • the photopolymer 30b served as a photo-sensing portion employs a product "OMNI-DEX” manufactured by Dupon, Ltd. and has a thickness of about 20 mm.
  • the photopolymer is composed of matrix polymer and monomer M uniformly dispersed therein.
  • a beam LA with a power of 10 to 400 mJ/cm 2 is applied to the photopolymer, so that the monomer M is polymerised in the exposed portion.
  • the monomer M is moved from the area around the exposed portion so that the density of the monomer M is variable in any location. This brings about the modulation of the refractive index.
  • the hologram recording medium 30 composed of such photopolymer does not need a special developing treatment after the exposure.
  • the holographic stereogram printer apparatus 3 according to this embodiment in which is used the hologram recording medium 30 having the photopolymer as a photo-sensing portion may be simplified in construction.
  • Fig.7 is an expanded view showing the recording medium feeding mechanism 50 provided in the holographic stereogram printer apparatus 3.
  • the recording medium feeding mechanism 50 includes a roller 51 and an intermittent feeding roller 52.
  • the hologram recording medium 30 is stored in a film cartridge with the medium 30 wound around the roller 51.
  • the recording medium feeding mechanism 50 is constructed to rotatively and axially support the roller 51 located in the film cartridge 53 mounted to a given position with a given amount of torque and hold the hologram recording medium 30 pulled out of the film cartridge 53 through the effect of the roller 51 and the intermittent feeding roller 52.
  • the recording medium feeding mechanism 50 holds the hologram recording medium 30 so that the main face of the hologram recording medium 30 is substantially perpendicular to the object beam between the roller 51 and the intermittent feeding roller 52.
  • the roller 51 and the intermittent feeding roller 52 are pulled against each other by a torsion coil spring. This pulling force applies given tension onto the hologram recording medium 30 loaded as bridged between the roller 51 and the intermittent feeding roller 52.
  • the intermittent feeding roller of the mechanism 50 is connected to a stepping motor (not shown).
  • the roller 52 is allowed to be rotated in the direction indicated by the arrow Al of Fig.7 based on the force of rotation transmitted from the stepping motor.
  • This stepping motor serves to sequentially rotate the roller 52 by a given angle corresponding to one holographic element each time the exposure of one image is terminated. This rotation results in feeding the hologram recording medium 30 by one holographic element at each exposure of one image.
  • An ultraviolet lamp 54 is located along the travelling path of the hologram recording medium 30 at a later stage of the intermittent feeding roller 52. This ultraviolet lamp 54 is used for completing the polymerisation of the monomer M of the exposed hologram recording medium 30 and serves to apply an ultraviolet ray UV of a given power to the hologram recording medium 30 fed by the roller 52.
  • a rotatively and axially supported heat roller 55, a pair of ejecting rollers 56 and 57, and a cutter 58 are located, in the described order.
  • the ejecting rollers 56 and 57 serve to feed the hologram recording medium 30 so that the side of the cover sheet 30c of the hologram recording medium 30 is wound halfway around the heat roller 55 in a contacting state.
  • the ejecting rollers 56 and 57 are connected to a stepping motor (not shown) and are rotated using the force of rotation transmitted from the stepping motor.
  • the stepping motor serves to rotate the ejecting rollers 56 and 57 by a given angle corresponding to one holographic element each time the exposure of one image is terminated in synchronism with the rotation of the intermittent feeding roller 52 in response to the control signal S2 supplied from the control computer 2. This rotation allows the hologram recording medium 30 to positively feed around the heat roller 55 in a contact state without the occurrence of slack in the hologram recording medium 30 between the intermittent feeding roller 52 and the ejecting rollers 56 and 57.
  • the heat roller 55 provides a heating unit such as a heater inside of itself. This heating unit serves to keep the peripheral side at a temperature of about 120° C. Then, the heat roller 55 serves to heat the photopolymer layer 30b of the hologram recording medium 30 being fed with the cover sheet 30c laid therebetween, for increasing a modulation of an refractive degree of the photopolymer layer 30b and fixing the recording image on the hologram recording medium 30.
  • the heat roller 55 has an outer diameter selected so that the interval between the contact of the hologram recording medium 30 on the peripheral surface of the heat roller 55 and the release thereof is substantially similar to the interval when the recording image is fixed.
  • the cutter 58 provides a cutter driving mechanism (not shown). By driving the cutter driving mechanism, the hologram recording medium 30 being fed to the cutter 58 can be cut out.
  • This cutter driving mechanism operates to drive the cutter 58 when all of the image-recorded portion of the hologram recording medium 30 is ejected outside of the cutter 58 after all of each image formed by each image data piece of the parallax image series is recorded on the hologram recording medium 30 in response to the control signal S2 supplied from the control computer 2. This operation allows the portion where the image data is recorded to be cut out of the other portion and to be ejected outside as one holographic stereogram.
  • the control computer 2 When creating the holographic stereogram, the control computer 2 operates to drive the display unit 41 based on the image data D5 supplied from the data processing unit 1 and display the image on the display unit 41. Then, the control computer 2 operates to send out the control signal S1 to the shutter 32 so that the shutter 32 is open for a given time for exposing the hologram recording medium 30.
  • the laser beam L2 transmitted through the shutter 32, fired by the laser beam source 31, is partially reflected on the half mirror 33 and partially transmitted through the half mirror 33.
  • the reflected beam L3 is entered as the reference beam into the hologram recording medium 30 through a light introducing block 37.
  • the transmitted beam L4 is projected on the display unit 41 as projection light. This projection light is entered as the object beam into the hologram recording medium 30. This operation allows one image displayed on the display unit 41 to be recorded as a stripped holographic element on the hologram recording medium 30.
  • control computer 2 operates to send out the control signal S2 to the stepping motor connected to the intermittent feeding roller 52 and the stepping motor connected to the ejecting rollers 56 and 57 for driving them. This operation allows the hologram recording medium 30 to be fed by one holographic element.
  • control computer 2 operates to drive the display unit 41 based on the next image data D5 supplied from the data processing unit 1 and display the next image on the display unit 41. Then, by sequentially repeating the similar operation, each image formed on each image data D5 supplied from the data processing unit 1 is sequentially recorded as stripped holographic elements on the hologram recording medium 30.
  • this holographic stereogram creating system is arranged so that the image formed on the image data recorded in the recording unit 12 is sequentially displayed on the display unit 41, the shutter 32 is open for each image, and each image is sequentially recorded as a stripped holographic element on the hologram recording medium 30.
  • the hologram recording medium 30 is fed by one holographic element for each image.
  • the holographic elements are sequentially arranged in the horizontal (lateral) direction. This arrangement allows a plurality of images containing the horizontal parallax information to be recorded as laterally sequential holographic elements on the hologram recording medium 30. This results in providing the holographic stereogram with the horizontal parallax.
  • the ultraviolet ray UV is applied from the ultraviolet lamp 54 onto the hologram recording medium 30 on which the holographic elements are recorded. This application completes the polymerisation of the monomer M.
  • the hologram recording medium 30 is heated by the heat roller 55 for fixing the recording image.
  • control computer 2 operates to supply the control signal S2 to the cutter driving mechanism for driving the mechanism. This results in cutting the portion where the image is recorded of the hologram recording medium 30 by the cutter 58 and then ejecting it as one holographic stereogram.
  • the foregoing description has concerned with the holographic stereogram provided with only the horizontal parallax (that is, the stripped holographic element).
  • the present invention may apply to the holographic stereogram having horizontal and vertical parallaxes and stripped holographic elements.
  • the present invention may apply to a passive hologram or an edge-lit hologram.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Holo Graphy (AREA)
EP97401487A 1996-07-02 1997-06-26 Verfahren und Vorrichtung zur Erzeugung eines holographischen Stereogramms Withdrawn EP0816952A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP17238196A JPH1020756A (ja) 1996-07-02 1996-07-02 ホログラフィックステレオグラムの作成方法及び作成装置
JP172381/96 1996-07-02

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Publication Number Publication Date
EP0816952A2 true EP0816952A2 (de) 1998-01-07
EP0816952A3 EP0816952A3 (de) 1998-04-15

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EP0969338A1 (de) * 1998-07-03 2000-01-05 Sony Corporation Vorrichtung und Verfahren zur Erzeugung eines holographischen Stereogramms
LT4842B (lt) 1999-12-10 2001-09-25 Uab "Geola" Hologramų spausdinimo būdas ir įrenginys
US7565003B2 (en) * 2002-03-15 2009-07-21 Sony Corporation Image processing apparatus and method, printed matter production apparatus and method, and printed matter production system

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US6330088B1 (en) 1998-02-27 2001-12-11 Zebra Imaging, Inc. Method and apparatus for recording one-step, full-color, full-parallax, holographic stereograms
US6266167B1 (en) 1998-02-27 2001-07-24 Zebra Imaging, Inc. Apparatus and method for replicating a hologram using a steerable beam
JP4534337B2 (ja) * 2000-10-19 2010-09-01 ソニー株式会社 撮影装置及び撮影方法、並びに、画像生成装置及び画像生成方法
FR2873458B1 (fr) * 2004-07-22 2006-11-03 Dalila Morales Procede et dispositif de vision en relief sur ecran

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EP0816952A3 (de) 1998-04-15

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